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altos/stm: Make ao_spi_duplex out pointer const
[fw/altos]
/
src
/
stm
/
ao_arch_funcs.h
diff --git
a/src/stm/ao_arch_funcs.h
b/src/stm/ao_arch_funcs.h
index 25b435879b3fbab71e5625b3a2ddebaaf2586fca..18ca20dab69b2b2dec06a643a01372a92a141215 100644
(file)
--- a/
src/stm/ao_arch_funcs.h
+++ b/
src/stm/ao_arch_funcs.h
@@
-3,7
+3,8
@@
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
@@
-80,7
+81,13
@@
void
ao_spi_send_fixed(uint8_t value, uint16_t len, uint8_t spi_index);
void
ao_spi_send_fixed(uint8_t value, uint16_t len, uint8_t spi_index);
void
-ao_spi_send_sync(void *block, uint16_t len, uint8_t spi_index);
+ao_spi_send_sync(const void *block, uint16_t len, uint8_t spi_index);
+
+void
+ao_spi_start_bytes(uint8_t spi_index);
+
+void
+ao_spi_stop_bytes(uint8_t spi_index);
static inline void
ao_spi_send_byte(uint8_t byte, uint8_t spi_index)
static inline void
ao_spi_send_byte(uint8_t byte, uint8_t spi_index)
@@
-96,25
+103,41
@@
ao_spi_send_byte(uint8_t byte, uint8_t spi_index)
break;
}
break;
}
- stm_spi->cr2 = ((0 << STM_SPI_CR2_TXEIE) |
- (0 << STM_SPI_CR2_RXNEIE) |
- (0 << STM_SPI_CR2_ERRIE) |
- (0 << STM_SPI_CR2_SSOE) |
- (0 << STM_SPI_CR2_TXDMAEN) |
- (0 << STM_SPI_CR2_RXDMAEN));
-
- /* Clear RXNE */
+ while (!(stm_spi->sr & (1 << STM_SPI_SR_TXE)))
+ ;
+ stm_spi->dr = byte;
+ while (!(stm_spi->sr & (1 << STM_SPI_SR_RXNE)))
+ ;
(void) stm_spi->dr;
(void) stm_spi->dr;
+}
- while (!(stm_spi->sr & (1 << STM_SPI_SR_TXE)));
- stm_spi->dr = byte;
+static inline uint8_t
+ao_spi_recv_byte(uint8_t spi_index)
+{
+ struct stm_spi *stm_spi;
+
+ switch (AO_SPI_INDEX(spi_index)) {
+ case 0:
+ stm_spi = &stm_spi1;
+ break;
+ case 1:
+ stm_spi = &stm_spi2;
+ break;
+ }
+
+ while (!(stm_spi->sr & (1 << STM_SPI_SR_TXE)))
+ ;
+ stm_spi->dr = 0xff;
+ while (!(stm_spi->sr & (1 << STM_SPI_SR_RXNE)))
+ ;
+ return stm_spi->dr;
}
void
ao_spi_recv(void *block, uint16_t len, uint8_t spi_index);
void
}
void
ao_spi_recv(void *block, uint16_t len, uint8_t spi_index);
void
-ao_spi_duplex(void *out, void *in, uint16_t len, uint8_t spi_index);
+ao_spi_duplex(
const
void *out, void *in, uint16_t len, uint8_t spi_index);
extern uint16_t ao_spi_speed[STM_NUM_SPI];
extern uint16_t ao_spi_speed[STM_NUM_SPI];